Influenza A virus has a specific surface protein called Hemagglutinin A (HA-A) on its outer envelope.
Monoclonal antibodies can be used in rapid diagnostic tests to detect this HA-A protein and confirm an infection.
Explain why monoclonal antibodies used to detect Influenza A would not react with Influenza B virus, which has a different surface protein called Hemagglutinin B (HA-B).